I'm trying to install mongo at my mac, I run "pecl install mongodb" and got

ERROR: failed to write /usr/lib/php/extensions/no-debug-non-zts-20180731/mongodb.so (copy(/usr/lib/php/extensions/no-debug-non-zts-20180731/mongodb.so): failed to open stream: Read-only file system)

then I tried this solution , but i still get the same error message said failed to open stream .

I've tried sudo mount -uw / and get mount_apfs: volume could not be mounted: Permission denied mount: / failed with 66

But I check my csrutil status. It shows System Integrity Protection status: disabled.

How to make it writeable.